/************************************************************************************
 * DistanceSensor.h - Arduino library for retrieving data from the Distance sensors *
 * Copyright 2011 Jeroen Doggen (jeroendoggen@gmail.com)                            *
 * More info: http://www.robot-electronics.co.uk/files/SRF04.pde                    *
 ************************************************************************************
 * Version History:                                                                 *
 *  Version 0.1:                                                                    *
 *                                                                                  *
 * Roadmap:                                                                         *
 *  Version 0.2: ??                                                                 *                                                                               
 ************************************************************************************
 * This library is free software; you can redistribute it and/or                    *
 * modify it under the terms of the GNU Lesser General Public                       *
 * License as published by the Free Software Foundation; either                     *
 * version 2.1 of the License, or (at your option) any later version.               *
 *                                                                                  *
 * This library is distributed in the hope that it will be useful,                  *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of                   *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU                *
 * Lesser General Public License for more details.                                  *
 *                                                                                  *
 * You should have received a copy of the GNU Lesser General Public                 *
 * License along with this library; if not, write to the Free Software              *
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA       *
 ***********************************************************************************/

#ifndef DistanceSensor_h
#define DistanceSensor_h

#if defined(ARDUINO) && ARDUINO >= 100
  #include "Arduino.h"
#else
  #include "WProgram.h"
  #include <pins_arduino.h>
#endif

#define __cxa_pure_virtual()

//abstract class DistanceSensor
class DistanceSensor 
{
	public:
		inline virtual void begin(){ /*void*/ };
		virtual int getDistanceCentimeter()=0; 	// Is implemented in derived classes

		boolean isCloser(int threshold);    	// Compare distance value to threshold
		boolean isFarther(int threshold);  		// Compare distance value to threshold
		
		void setAveraging(int avg); 			// calculate average of multiple samples
		
	protected:
		int _average;
};
#endif